21552430512554 has 16 divisors (see below), whose sum is σ = 33802944269760. Its totient is φ = 10286690900640.

The previous prime is 21552430512553. The next prime is 21552430512559. The reversal of 21552430512554 is 45521503425512.

It is not an unprimeable number, because it can be changed into a prime (21552430512553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477096659 + ... + 477141830.

It is an arithmetic number, because the mean of its divisors is an integer number (2112684016860).

Almost surely, 2^{21552430512554} is an apocalyptic number.

21552430512554 is a deficient number, since it is larger than the sum of its proper divisors (12250513757206).

21552430512554 is a wasteful number, since it uses less digits than its factorization.

21552430512554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954239005.

The product of its (nonzero) digits is 1200000, while the sum is 44.

The spelling of 21552430512554 in words is "twenty-one trillion, five hundred fifty-two billion, four hundred thirty million, five hundred twelve thousand, five hundred fifty-four".